Abstract
In order to more critically evaluate the function of ACL-deficient knees, we designed a functional ability test composed of four different one-leg hopping performance tests. The functional tests utilized in this study were: 1. figure of eight hop; 2. one-leg up/down hop; 3. one-leg side hop; and 4. one-leg hop for distance. Sixty-six athletes who underwent ACL reconstruction were evaluated with these performance tests. When compared with athletes with ACL deficiency, those who had ACL reconstruction showed significant improvement in all the tests. On the other hand, only 39% of the subjects were judged to be normal in all four performance tests despite the surgical treatment. The athletes who were apprehensive about performing these functional tests showed poor results regardless of actual stability and muscle strength.
